The band was formed with the name of Mercilless by friends crazy for thrash metal, even if stabilized with Thiago on guitar and vocals, William on drums, Ramon on guitars and Rafael on bass. The proposal of the band and play the purest thrash metal influenced by classic bands as Kreator, Slayer, Vio-lence, Dark Angel, Exodus and many others, but with an own sound without influencing leave completely by bands mentioned above which certainly differs Mercilless of the other bands of the genre.

At home, 2007 the band has plans to record his demo, even with difficulty to test and even touch and launched the much awaited Possessed By Thrash recorded in JF/MG during the days 29 and Septembar 30 of that same year with 4 tracks all in English with lyrics depicting themes such as social ills, degradation human, and thrash way of life. After launching the band makes some shows until the end of 2007 the band suffers the first casualty of its line-up leaves Rafael for the entry of Junior that brings more weight and energy to the band.

2008 begins with some shows that were very important so that the band could consolidate your name on the national scene, playing in other states such as Sao Paulo, Rio de Janeiro shows that these were very well accepted by thashers.

In 2009 the band changed its name from Mercilless to Deathraiser, for reasons already own and the existence of several bands with the name of Mercilless, with the name change of the band also shows a new sound, with more speed and aggressive of his escape without purpose that is playing fast and aggressive thrash metal.

At this time the band is preparing to launch the debut, expected to be launched by the end of the year.

(Source: Facebook, 17.1.2015)